Re: warning: module to simplify adding compiler warnings

[Paolo Bonzini]

> +# gl_WARN_ADD([parameter]) adds parameter to WARN_CFLAGS if compiler
> +# supports it.  For example, use gl_WARN_ADD([-Werror]).
> +AC_DEFUN([gl_WARN_ADD],
> +[
> +  pushdef([param],[translit([$1],[ABCDEFGHIJKLMNOPQRSTUVWXYZ./-],
> +                                 [abcdefghijklmnopqrstuvwxyz___])])

There are m4sh macros AS_VAR_SET, AS_VAR_PUSH, AS_VAR_POP, AS_VAR_IF
that help doing this and support things like

for i in no-foo bar no-baz; do
  gl_WARN_ADD([-W$i])
done

I can do the change, or you can do it; as you prefer.  In any case if
you pushdef you'd better popdef too. :-)

Paolo